It turns out that I bring this pack everywhere. I can fly with is stuffed into my carry-on without it taking up much room or adding weight- then I have a pack to use cragging, ice climbing, mountain biking, or just using to put my wallet in on my way to yoga. I used this as a leader's pack on The Direct South Buttress of Tiedeman in the Waddington Range. It was perfectly sized to fit a jacket, water, crampons, headlamp. I find that lots of other packs of similar weight do not quite have the volume this one does. Knots do help to keep the straps from slipping. You can attach an ice ax- or quickly throw your jacket under the bungee. When really loaded down, the straps are a little thin- you just have to adjust them so they lie flush on your back. I prefer not to have a waist belt when climbing- they get in the way of my harness. So this pack works perfectly when the climbing is an adventure demanding a little extra gear.

With out question, the lightest backpack I've ever owned. Good and useful pockets on the top and the main compartment holds plenty for a quick climb or excursion. Compression cord collapses the pack perfectly for light loads. It's even got an external clip for an ice axe or whatever...
What this pack is not: substantial, heavy -duty or load-bearing for heavy loads. The straps are mesh—literally.
My only real complaint is that the plastic clamps that hold the shoulder straps don't hold very well, so the pack comes un-adjusted. the straps are smooth and small like little ribbons and they slip away slowly as you hike. lame. knot the straps so it doesn't slide to far down.

This pack is extremely light and durable. A little small but it does the job. Just wish it had a hydration sleeve. Gets the job done on short day hikes.

Great lightweight pack. But no support in the shoulder straps (only mesh) and no waist belt for stability. I use this more as a go-to pack for any random task, from groceries at the Coop to hauling bouldering shoes and chalk to the gym. pros: light, collapsable, neat pockets, durable (so far). Cons: flimsy straps and no support. For the price, it works for me.

Mountain Hardware made this one very nearly perfect. Slightly beefier shoulder straps (these seem a little frail, and dig in a bit too much) would complete the picture.

This was a great pack, and I miss it dearly, but sadly during a month of traveling and hiking, it was starting to unravel at the bottom. The shoulder straps, although flimsy, provided support, and the back-panel made of a like weight foam material was comfortable.

I tried the Scrambler an a lightweight alpine summit pack. The shoulder straps are far too flimsy, acting more like cord, and lack of a waist belt (even if high) prevents any weight from being offloaded from the shoulder floss. One day was more than enough: this pack will be sold or given away.

Mountain Hardwear did a great job on this summit bag. I will be packing this in my backpack for sure. The materials used are solid and light as can be. And you will be surprised by how much of a cushion they actually give you on the back. It's only a few centimeters thick but that's all you need for a pack this light. What a wonderful thing.